I suspect an amazing and innovative level, but I am totally stuck after two turn arounds. Still trying...
Wow! Finally I was able to finish it.... it was complex and it requires some ability skill. You got me for months in a specific step I didn't see but today... I saw it. Thanks!
Original ability level but I think that there are more of one solutions and I don't know if I did it in your intended solution....I don't use the stairs for nothing...Thanks for sharing and well done @Jomer